A persulfate slow-release system based on non-radical oxidation and a construction method and application thereof
By constructing a core-shell structured non-radical persulfate oxidation slow-release system and utilizing a Mg-Fevac-LDH/biochar composite catalyst, the problems of easy aggregation of the layered structure and metal ion leaching in the persulfate catalytic system in soil remediation were solved, achieving efficient, stable and targeted removal of PAHs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG UNIV OF SCI & TECH
- Filing Date
- 2026-01-29
- Publication Date
- 2026-05-29
AI Technical Summary
Existing persulfate catalytic systems for soil remediation suffer from problems such as easy aggregation of layered structures, easy leaching of metal ions, insufficient distribution of oxidants in the remediation area, low remediation efficiency, and back diffusion of pollutants, making it difficult to effectively degrade organic pollutants such as polycyclic aromatic hydrocarbons (PAHs).
A non-radical oxidation-based persulfate slow-release system was adopted. By constructing a core-shell structure, using Mg-Fevac-LDH/biochar composite material as a catalyst, persulfate as an oxidant, polycaprolactone as a core structure binder, bentonite as a shell structure binder, and quartz sand as a pore structure modifier, a non-radical oxidation system dominated by high-valence iron-oxygen was formed to achieve targeted removal of PAHs.
It achieves efficient, stable, targeted and long-term removal of PAHs pollutants, with a catalytic degradation efficiency of up to 83.2%, solving the problems of low remediation efficiency and secondary pollution risk in existing technologies.
Smart Images
Figure CN122104236A_ABST